# Isotope Browser vs Radioactive Decay Simulator

The clearest difference is rating: Isotope Browser at 4.8 against Radioactive Decay Simulator's 4.0. Isotope Browser also leads on update cadence (every 6 weeks vs every 17 months) and ratings volume (27 vs 1). Radioactive Decay Simulator's advantage is review sentiment (100% vs 83%) and iOS requirement (9.3 vs 11.0). On price, ads, in-app purchases and monetization model there is nothing between them.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

Isotope Browser holds the better App Store score, 4.8 against 4.0. That said, the two scores are not equally well evidenced: Isotope Browser has 27 ratings behind it against 1, so its average is the more settled of the two. Written reviews complicate that: 83% of Isotope Browser's written reviews are positive against 100% of Radioactive Decay Simulator's, so the app with the better star average is not the one people write more warmly about.

Isotope Browser ships an update every 6 weeks, Radioactive Decay Simulator every 17 months. Both last shipped on November 1, 2026.

## The numbers

| Metric | Isotope Browser | Radioactive Decay Simulator |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.8 (27 ratings)](https://appshunter.io/ios/app/isotope-browser/id943890538/reviews)** | [4.0 (1 ratings)](https://appshunter.io/ios/app/radioactive-decay-simulator/id959357000/reviews) |
| Number of ratings | **27** | 1 |
| Positive reviews | 82.6% of reviews | **100.0% of reviews** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Every 6 weeks** | Every 17 months |
| Monetization | Free | Free |
| Size | 8 MB | 20 MB |
| Requires iOS | 11.0 | **9.3** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [IAEA](https://appshunter.io/developer/535500126) | [Alistair Shaw](https://appshunter.io/developer/959356999) |

## What reviewers say

### Isotope Browser

[App page](https://appshunter.io/ios/app/isotope-browser/id943890538)

Access comprehensive nuclear data for over 4,000 nuclides and isomers. Explore interactive charts, filter by various criteria, and view detailed information for each nuclide. Data is sourced from reliable resources and available offline.

**Highlights:** Properties of over 4,000 nuclides and isomers, Interactive Chart of Nuclides, Periodic Table of Elements, Filter by half-life, decay mode, radiation type, and energy, Detailed nuclide information with web links, Offline access to embedded database

**Features:** macOS Compatibility, Vision Pro support

**In-app purchases:** none


### Radioactive Decay Simulator

[App page](https://appshunter.io/ios/app/radioactive-decay-simulator/id959357000)

This educational tool simulates radioactive decay for a group of atoms. Users can choose preset atoms or input custom half-lives to observe decay in real-time graphs. The simulator allows for adjustments in atom count and speed for efficient analysis.

**Highlights:** Emulates radioactive decay, Select preset or custom atoms, Adjust atom count, Real-time decay graphs, Adjustable simulation speed

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Isotope Browser free?

Isotope Browser is free to download, with no in-app purchases.

### Is Radioactive Decay Simulator free?

Radioactive Decay Simulator is free to download, with no in-app purchases.

### Which has better reviews, Isotope Browser or Radioactive Decay Simulator?

Isotope Browser is rated higher. Isotope Browser averages 4.8 out of 5 from 27 ratings, while Radioactive Decay Simulator averages 4.0 from 1 ratings.

### Do Isotope Browser or Radioactive Decay Simulator have ads?

Neither Isotope Browser nor Radioactive Decay Simulator shows ads.

### Which is updated more often, Isotope Browser or Radioactive Decay Simulator?

Isotope Browser ships an update every 6 weeks, and Radioactive Decay Simulator every 17 months. Most recently, Isotope Browser was updated on November 1, 2026 and Radioactive Decay Simulator on November 1, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*